1 Department of Cardiopulmonary Bypass, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, National Clinical Research Center for Cardiovascular Diseases, Fuwai Hospital, No. 167 Beilishi Road, Xicheng District, Beijing, 10010, China.
2 Department of Cardiopulmonary Bypass, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, National Clinical Research Center for Cardiovascular Diseases, Fuwai Hospital, No. 167 Beilishi Road, Xicheng District, Beijing, 10010, China. jibingyang@fuwai.com.